Can The HAMMER filesystem can extends volume without destory the original data?

for example:
I have a volume:
newfs_hammer -L Home /dev/ad0s1d
mount_hammer /dev/ad0s1d /home
now I want to extends it:
newfs_hammer -L Home /dev/ad1s1d
mount_hammer /dev/ad0s1d /home
The data in /home is kept and the volume capacity is extended.

:Your mean is that HAMMER will support the feature in furture.
:And it will do most as solaris zfs do?

It will support the feature in the future, yes. HAMMER isn't ZFS
so I doubt it will do most of what ZFS does, nor would ZFS do most
of what HAMMER does. RAID mechanics are best left to another layer,
HAMMER's approach to redundancy will be by using replication.

I mean is that HAMMER eventually will like zfs file system or do
better than zfs.
Surely HAMMER is HAMMER,zfs is zfs,they are different.
I expect HAMMER will do better than zfs and be ported to FreeBSD.